I think both of those concerns were addressed by the Dvorak of piano keyboards: https://en.wikipedia.org/wiki/Jank%C3%B3_keyboard https://en.wikipedia.org/wiki/

I think both of those concerns were addressed by the Dvorak of piano keyboards: https://en.wikipedia.org/wiki/Jank%C3%B3_keyboard https://en.wikipedia.org/wiki/Jank%C3%B3_keyboard Has the symmetry of GP while large jumps are accomplished by shifting up a row or two. I assume it didn’t take off for the same reason Dvorak didn’t.